Corporate bond mutual fund

A corporate bond mutual fund in India is an open-ended debt scheme that must invest a minimum of 80% of its total assets in the highest-rated corporate bonds – specifically AA+ and above rated corporate debt instruments – under SEBI’s October 2017 scheme categorisation circular. This mandatory quality screen restricts corporate bond funds to investment-grade, near-sovereign-quality corporate paper, limiting credit risk while exposing investors to the yield spread that high-rated corporations offer above government securities.

Regulatory definition

SEBI circular SEBI/HO/IMD/DF3/CIR/P/2017/114 defined corporate bond funds as:

• Scheme type: Open-ended debt scheme predominantly investing in AA+ and above rated corporate bonds.
• Minimum allocation: At least 80% of total assets in AA+ (or higher) rated corporate bonds.
• Duration constraint: None; fund manager may manage duration freely.
• Benchmark: Typically CRISIL Corporate Bond Composite Index, NIFTY Corporate Bond Index, or I-Sec Si-BEX.

Credit quality mandate

The AA+ minimum rating mandate is the defining feature. Credit ratings of AA+ or above (equivalent from any SEBI-recognised rating agency: CRISIL, ICRA, CARE, ACUITE, Brickwork) represent investment-grade, high-quality corporate issuers including:

• Large private sector banks (HDFC Bank, ICICI Bank, Axis Bank) in their bond issuance.
• AAA-rated NBFCs (HDFC, Bajaj Finance, Mahindra Finance).
• Highly rated PSU companies (NABARD, NTPC, NHAI, REC, PFC).
• High-rated infrastructure and utility companies.

The 20% residual may be held in government securities, other corporate bonds, or cash. In practice, most corporate bond funds hold 85% to 95% in AA+ or above paper.

Yield spread over government securities

Corporate bond fund returns are driven by:

1. Base yield: The prevailing government security (G-Sec) yield for equivalent maturity.
2. Credit spread: The additional yield that even AA+ companies must pay over government securities due to the marginal credit risk and lower liquidity of corporate bonds.
3. Duration effect: Changes in interest rates affect corporate bond prices similarly to government bonds (bond math), with the magnitude depending on duration.

The credit spread for AA+ corporate bonds over AAA G-Secs in India is typically 30 to 80 basis points (0.3% to 0.8%), reflecting compensation for credit and liquidity risk.

Duration

Unlike gilt funds (which tend to hold long-duration portfolios) or short-duration funds (mandated to hold 1-3 year duration), corporate bond funds have no duration constraint. In practice, most corporate bond funds operate with medium durations of 2 to 5 years, reflecting the typical issuance maturity profile of Indian corporate bonds (3 to 7 years).

Taxation

Corporate bond funds are debt-oriented and taxed as per the Finance Act 2023 amendment.

For units purchased on or after 1 April 2023:

All gains are taxed at the investor’s slab rate, regardless of holding period.

For units purchased before 1 April 2023:

• Less than 3 years: STCG at slab rate.
• 3 years or more: LTCG at 20% with indexation.

Securities Transaction Tax does not apply to debt fund transactions. See capital gains tax in India and ITR-2 for reporting.

Comparison with adjacent categories

Corporate bond versus banking and PSU debt fund

A banking and PSU debt fund must invest at least 80% in bonds of banks and PSUs – a sub-segment of the AA+ universe. Corporate bond funds include bonds from private corporates (HDFC, Bajaj Finance) in addition to banks and PSUs, giving slightly more issuer diversification.

Corporate bond versus credit risk fund

A credit risk fund must invest at least 65% in below-AA-rated instruments (AA and below), taking on higher credit risk for higher potential yield. Corporate bond funds are restricted to AA+ and above, making them significantly lower credit-risk than credit risk funds.

Corporate bond versus gilt fund

Gilt funds hold government securities (zero credit risk, high duration). Corporate bond funds hold high-rated corporates (minimal but non-zero credit risk, typically medium duration). Corporate bond funds offer a yield premium over gilt funds in exchange for marginal credit and liquidity risk.

Corporate bond versus short-duration fund

A short-duration fund mandates 1-3 year Macaulay duration and can hold instruments across credit quality. Corporate bond funds have no duration constraint but a strict credit quality floor.

Exemplar schemes

Established corporate bond funds include:

• HDFC Corporate Bond Fund (HDFC Mutual Fund)
• ICICI Prudential Corporate Bond Fund (ICICI Prudential Mutual Fund)
• Nippon India Corporate Bond Fund (Nippon India Mutual Fund)
• Kotak Corporate Bond Fund (Kotak Mahindra Mutual Fund)
• Axis Corporate Debt Fund (Axis Mutual Fund)
• Aditya Birla Sun Life Corporate Bond Fund (Aditya Birla Sun Life Mutual Fund)
• SBI Corporate Bond Fund (SBI Mutual Fund)

These are cited for reference only.

Suitability

Corporate bond funds are suitable for:

• Investors who want high-quality debt exposure with a yield premium over gilt funds.
• Investors with a 2-5 year horizon seeking predictable, stable returns from high-grade corporate debt.
• Conservative investors who want credit risk limited to investment-grade paper.
• Investors seeking regular income through the IDCW option at predictable, low-volatility yields.

They are less suitable for:

• Investors seeking maximum yield (credit risk funds offer higher yields).
• Investors seeking capital appreciation from interest rate movements (gilt funds offer higher duration sensitivity).

Regulatory oversight

Corporate bond funds are regulated by SEBI under the SEBI (Mutual Funds) Regulations, 1996. The mutual fund industry in India framework governs fund operations.

References

1. SEBI Circular SEBI/HO/IMD/DF3/CIR/P/2017/114, “Categorisation and Rationalisation of Mutual Fund Schemes”, 6 October 2017.
2. Finance Act 2023, Section 50AA.
3. SEBI (Mutual Funds) Regulations, 1996, as amended.